217 lines
5.0 KiB
Go
217 lines
5.0 KiB
Go
// Copyright 2009 Thomas Jager <mail@jager.no> All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package irc
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import (
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"bufio"
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"fmt"
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"log"
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"net"
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"os"
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"strings"
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"time"
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)
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const (
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VERSION = "GolangBOT v1.0"
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)
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var error_ bool
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func reader(irc *Connection) {
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br := bufio.NewReader(irc.socket)
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for !error_ {
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msg, err := br.ReadString('\n')
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if err != nil {
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irc.Error <- err
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break
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}
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irc.lastMessage = time.Now()
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msg = msg[0 : len(msg)-2] //Remove \r\n
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event := &Event{Raw: msg}
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if msg[0] == ':' {
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if i := strings.Index(msg, " "); i > -1 {
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event.Source = msg[1:i]
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msg = msg[i+1 : len(msg)]
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} else {
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irc.log.Printf("Misformed msg from server: %#s\n", msg)
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}
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if i, j := strings.Index(event.Source, "!"), strings.Index(event.Source, "@"); i > -1 && j > -1 {
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event.Nick = event.Source[0:i]
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event.User = event.Source[i+1 : j]
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event.Host = event.Source[j+1 : len(event.Source)]
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}
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}
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args := strings.SplitN(msg, " :", 2)
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if len(args) > 1 {
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event.Message = args[1]
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}
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args = strings.Split(args[0], " ")
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event.Code = strings.ToUpper(args[0])
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if len(args) > 1 {
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event.Arguments = args[1:len(args)]
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}
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irc.RunCallbacks(event)
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}
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irc.syncreader <- true
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}
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func writer(irc *Connection) {
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b, ok := <-irc.pwrite
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for !error_ && ok {
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if b == "" || irc.socket == nil {
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break
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}
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_, err := irc.socket.Write([]byte(b))
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if err != nil {
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irc.log.Printf("%s\n", err)
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irc.Error <- err
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break
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}
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b, ok = <-irc.pwrite
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}
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irc.syncwriter <- true
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}
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//Pings the server if we have not recived any messages for 5 minutes
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func pinger(i *Connection) {
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i.ticker = time.Tick(1 * time.Minute) //Tick every minute.
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i.ticker2 = time.Tick(15 * time.Minute) //Tick every 15 minutes.
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for {
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select {
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case <-i.ticker:
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//Ping if we haven't recived anything from the server within 4 minutes
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if time.Since(i.lastMessage) >= (4 * time.Minute) {
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i.SendRawf("PING %d", time.Now().UnixNano())
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}
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case <-i.ticker2:
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//Ping every 15 minutes.
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i.SendRawf("PING %d", time.Now().UnixNano())
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//Try to recapture nickname if it's not as configured.
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if i.nick != i.nickcurrent {
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i.nickcurrent = i.nick
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i.SendRawf("NICK %s", i.nick)
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}
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}
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}
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}
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func (irc *Connection) Cycle() {
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irc.SendRaw("QUIT")
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irc.Reconnect()
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}
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func (irc *Connection) Quit() {
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irc.quitting = true
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irc.SendRaw("QUIT")
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}
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func (irc *Connection) Join(channel string) {
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irc.pwrite <- fmt.Sprintf("JOIN %s\r\n", channel)
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}
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func (irc *Connection) Part(channel string) {
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irc.pwrite <- fmt.Sprintf("PART %s\r\n", channel)
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}
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func (irc *Connection) Notice(target, message string) {
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irc.pwrite <- fmt.Sprintf("NOTICE %s :%s\r\n", target, message)
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}
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func (irc *Connection) Privmsg(target, message string) {
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irc.pwrite <- fmt.Sprintf("PRIVMSG %s :%s\r\n", target, message)
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}
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func (irc *Connection) SendRaw(message string) {
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irc.log.Printf("--> %s\n", message)
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irc.pwrite <- fmt.Sprintf("%s\r\n", message)
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}
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func (irc *Connection) SendRawf(format string, a ...interface{}) {
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irc.SendRaw(fmt.Sprintf(format, a...))
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}
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func (irc *Connection) GetNick() string {
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return irc.nickcurrent
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}
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func (i *Connection) Reconnect() error {
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close(i.pwrite)
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close(i.pread)
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<-i.syncreader
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<-i.syncwriter
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for {
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i.log.Printf("Reconnecting to %s\n", i.server)
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var err error
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i.socket, err = net.Dial("tcp", i.server)
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if err == nil {
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break
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}
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i.log.Printf("Error: %s\n", err)
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}
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error_ = false
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i.log.Printf("Connected to %s (%s)\n", i.server, i.socket.RemoteAddr())
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go reader(i)
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go writer(i)
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i.pwrite <- fmt.Sprintf("NICK %s\r\n", i.nick)
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i.pwrite <- fmt.Sprintf("USER %s 0.0.0.0 0.0.0.0 :%s\r\n", i.user, i.user)
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return nil
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}
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func (i *Connection) Loop() {
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for !i.quitting {
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e := <-i.Error
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if i.quitting {
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break
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}
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i.log.Printf("Error: %s\n", e)
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error_ = true
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i.Reconnect()
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}
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close(i.pwrite)
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close(i.pread)
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<-i.syncreader
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<-i.syncwriter
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}
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func (i *Connection) Connect(server string) error {
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i.server = server
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i.log.Printf("Connecting to %s\n", i.server)
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var err error
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i.socket, err = net.Dial("tcp", i.server)
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if err != nil {
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return err
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}
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i.log.Printf("Connected to %s (%s)\n", i.server, i.socket.RemoteAddr())
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i.pread = make(chan string, 100)
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i.pwrite = make(chan string, 100)
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i.Error = make(chan error, 10)
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i.syncreader = make(chan bool)
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i.syncwriter = make(chan bool)
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go reader(i)
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go writer(i)
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go pinger(i)
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i.pwrite <- fmt.Sprintf("NICK %s\r\n", i.nick)
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i.pwrite <- fmt.Sprintf("USER %s 0.0.0.0 0.0.0.0 :%s\r\n", i.user, i.user)
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if len(i.Password) > 0 {
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i.pwrite <- fmt.Sprintf("PASS %s\r\n", i.Password)
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}
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return nil
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}
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func IRC(nick, user string) *Connection {
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irc := new(Connection)
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irc.registered = false
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irc.pread = make(chan string, 100)
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irc.pwrite = make(chan string, 100)
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irc.Error = make(chan error)
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irc.nick = nick
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irc.user = user
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irc.VerboseCallbackHandler = false
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irc.log = log.New(os.Stdout, "", log.LstdFlags)
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irc.setupCallbacks()
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return irc
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}
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